IPA: //ˌkɛm.oʊ.tækˈsɒn.ə.mi//
KK: /kɛmoʊˈtæksəˌnoʊmi/
The process of classifying living things by looking at their chemical makeup, particularly the proteins and other substances they contain.
Chemotaxonomy helps scientists understand the relationships between different species based on their biochemical characteristics.
Chemotaxonomy is formed from "chemo-" (from Greek "chēmeia", meaning chemistry or chemical) and "taxonomy" (from Greek "taxis", meaning arrangement, and "nomia", meaning law or distribution). The word refers to the classification of organisms based on their chemical composition and characteristics.
Think of 'chemistry' ('chemo-') being used to 'arrange' ('taxis') living things according to their chemical traits.
No commonly confused words.